.container{
   position: absolute;
   left: 50%;
   top: 50%;
   transform: translate(-50%, -150%);
}

.loading {
  width: 40px;
  height: 40px;
  border-radius: 100%;
  border: 5px #ffffff solid;
  border-right-color: #87CEEB;
  animation: loading 2s linear infinite;
}

@keyframes loading {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}